SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '940f330367a84381ebd95e76d43b8302e7817bfc34b5372c2f98b276cd1098ea' 
  AND token = 'wzyk6s+6hMU1roOHK8jLuEw+gyfQbOHKaXBl8lPt9AU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}